基于改进免疫克隆选择算法的柔性作业车间调度

针对柔性作业车间调度问题,以最小化完工时间为优化目标,提出了1种改进的免疫克隆选择算法。建立了柔性作业车间的调度模型。在初始化种群方面采用多种策略以提高种群的初始质量。构造了自适应变异算子。针对标准免疫算法的缺陷,利用种群分割的思想使其具有多样性,提高全局搜索能力。对6工件10机器的标准测试实例进行仿真,利用遗传算法、模拟退火算法、免疫算法求得的完工时间优化结果分别是47 s、48 s和50 s,利用该文算法求得的完工时间优化结果是45 s,该文算法得到最优解的概率为75%。     

求解大规模可靠性问题的改进差分进化算法

针对差分进化算法典型变异算子的局限,设计了全局加速的变异算子,进而提出全局加速的自适应改进算法.新变异算子能够均衡全局搜索与局部搜索,提高寻优效率.根据差分向量与整个种群分布范围的关系,有针对性的设定变异率值,减缓搜索范围缩小的趋势,保持较高的种群多样性.采用两区间选择策略,通过学习和比较自适应地调整交叉率,使其满足进化搜索的需要,同时提高算法的通用性.将改进算法应用于大规模可靠性问题中,实验结果表明,改进算法在解决大规模系统可靠性问题时具有更好的寻优效果.     

基于改进候鸟迁徙优化的多目标批量流混合流水车间调度

针对2+1+1型混合流水车间,研究了多目标不相等批量流混合流水车间调度问题,提出一种基于变邻域搜索的自适应候鸟迁徙优化(AMBO)算法,实现了最小化完工时间与最小平均在制品数量的多目标优化.相比原始候鸟迁徙算法,AMBO算法引入变邻域搜索策略,实现每个算子的权重随迭代次数自适应调整,并提出了时间窗算子,以提升交换算子搜...     

改进人工蜂群算法求解置换流水车间调度问题

针对置换流水车间调度问题（PFSP），以最小化最大完工时间为优化目标建立数学模型，设计了一种改进人工蜂群算法。该算法采用反向学习方法和混沌映射来生成初始种群，为使算法能够求解离散的调度问题，采用LRV规则将位置数值映射成工件排列顺序；在雇佣蜂阶段，融入差分进化算法的思想，加入高斯变异算子，使收敛速度加快；在跟随蜂阶段，加入自适应策略，将算法的勘探和开发能力进行平衡；在侦察蜂阶段，加入柯西变异算子，避免陷入局部极值。最后通过比较几种不同的算法，对Car算例以及部分Rec标准算例集进行仿真测试，验证该算法的有效性和优越性。     

基于实数编码的自适应伪并行遗传算法

根据适应度的方差，定义了一种度量种群多样性的指标。在实数编码遗传算法的交叉算子和变异算子中引入该指标，并将该指标用于指导交叉概率和变异概率两个参数的调整，从而使算法在计算过程中能够根据种群多样性的变化自适应地调整其参数。再采用并行计算的思想，在单台计算机上实现了一种类似并行遗传算法的自适应伪并行遗传算法。用这种方法对6个典型的多峰值函数求极值，并和其他方法进行比较，结果表明：所定义的种群多样性指标可以用于遗传算法的自适应调整，该算法具有较强的全局搜索能力和局部搜索能力，能够有效地克服早熟收敛问题。     

一种连续探索型自适应遗传算法及其应用

对经典遗传算子中的交叉算子和变异算子进行了重新设计，提出了一种连续探索型自适应遗传算法。该算法能够根据种群进化情况，动态地调整遗传算子，维持种群的多样性，克服过早收敛并加快了搜索速度，得到高品质解。将该算法用于最短路径求取中，仿真结果证实是合理的和有效的。     

自适应遗传算法在飞机调度问题中的应用

基于自适应遗传算法，实现了单跑道降落飞机调度问题的求解，算法以所有飞机的排列次序做为个体编码，解码时用移动方法确定飞机的降落时间，适应度函数的构造综合考虑了飞机的提前和延迟带来的损失，选择算子采用期望值方法，交叉算子用顺序交叉，变异算子用倒位变异，为提高算法的执行效率并避免早熟收敛，对交叉和变异概率均采用自适应策略，仿真结果表明了自适应遗传算法用于飞机调度问题的有效性。     

多种群并行的自适应差分进化算法

为了提高搜索速度,同时克服传统算法过早陷入局部最优值的不足,提出了一种改进自适应差分进化算法.改进算法在充分分析经典和改进变异操作算子的属性以及种群统计信息的基础上,按照个体适应度的差异,将个体分成不同的子种群并相应地引入与之匹配的变异算子,转换成一个多种群并行的优化问题,保证在加快算法收敛速度的同时有效跳出局部极值点...     

基于改进粒子群的柔性作业车间调度问题优化研究

主要针对柔性作业车间调度问题进行求解,利用改进粒子群算法作为求解方法,以最小化最大完工时间(C_max)作为该问题的求解目标.在算例的选取上,选用作业车间调度问题的8*8经典算例和柔性作业车间调度问题的Brandimarte算例对提出的算法进行验证.改进粒子群算法由遗传算法和粒子群算法构成,遗传算法具有较好的全局搜索能力,但搜索过程中收敛的精度不高,粒子群算法由于其寻优特性,在搜索过程中速度较快,但容易陷入局部最优,综合考虑两者的优缺点,将遗传算子引入粒子群算法中,采用交叉搜索的方式,调整惯性权重以及变异的方式使粒子进化,当粒子群进化到一定程度后,对部分粒子进行变异处理从而避免算法陷入局部最优解,同时可以提高粒子群算法的收敛精度.依据柔性作业车间调度问题的特点,在经过多次变换种群规模以及迭代次数后,求解出最适合柔性作业车间调度问题的最优解.     

考虑多资源约束的非等效并行机节能调度算法

针对瓶颈工序光刻过程中考虑能源消耗、多类型多数量的掩膜资源、换模等约束的非等效并行机调度问题,进行了改进型免疫克隆选择算法的调度方法研究.首先对问题域进行描述,以最小化总加权完成时间与能源消耗量为优化目标,建立了数学模型;在此基础上提出了一种带精英策略的多目标免疫克隆选择算法,该算法融合了非支配排序遗传算法的排序规则,并引入深度邻域搜索算子、种群更新算子以提高算法搜索性能及挖掘性能.最后,对算法进行仿真实验,结果表明该算法是有效的、可行的.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

正~~